import pandas as pd

data = {
    "name": ["Alice", "Bob", "Tom", "Jerry", "David"],
    "source": [66, 99, 55, 77, 88],
}
df = pd.DataFrame(data)

min = df["source"].min()
max = df["source"].max()
sum = df["source"].sum()
mean = df["source"].mean()
print(f"min:{min}, max:{max}, sum:{sum}, mean:{mean}")

""" 
min:55, max:99, sum:385, mean:77.0
"""